An explosion seen off the Caspian Sea on July Fourth was attributed to a mud volcano eruption. Gavriil Grigorov via Getty Images A mud volcano erupted on an island in the Caspian Sea about 46 miles ...

Mud volcanoes are little known in North America, but much more common in other parts of the world. By Michael R. Hudec/The Conversation | Published Dec 24, 2022 6:00 PM EST This article was originally ...

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